Self-oiling rotary cutter



C. J. PETRASEK.

SELF OILING ROTARY GUTTERk APPLICATION FILED FEB. 3, I92I.

Patented July' 4, 1922,

vll/1111111 right and depress the finger piece as much as necessary togive him the amount of` oil required. This action is, of course, againstthe force of the spring 25 which acts automatically to close the valve19 when the fingerv piece is released.

The plug 241 when removed provides a means to supply a fresh charge ofoil into the 'receptacle and when replaced in the position shown it actsas a closure for the outer end of the receptacle in connection with avalve 31. The plug is provided with an air vent 32 which is sealed bythe valve 31 by virtue of a light spring 33 interposed between thel nut27 and the valve 31 and seated upon'the stud 28. When the valve 19 yisopen as above described for the delivery of oil from the receptacle thenut 27 as well as all the other parts associated with the tie memberwill be drawn' inward, and hence the valve 31 is relatively free to opento admit air into the receptacle because the spring 33 is so relativelylightvor weak. Hence, there is no impediment to the outflow of oil fromthe receptacle because of external atmospheric pressure which mightresult if no air vent were provided.

The plug 24- is provided at its outer end with a plurality ofprojections 34 serving toA guard the vent 32 and prevent the 'cloggingup thereof by dirt or the like. lt will be noted that not only does thisappliance provide a convenient and reliable mean-s for Oil'ing a cuttingdevice for this rotary appliance, but also it is always' accessible -foruse as an oil can for oiling any other machine', it being onlylnecessary to unscrew it from its socket 14 for this purpose. To de'-tach the receptacle from its socket it is but necessary to unscrew itand then tilt it laterally to remove the linger piece inward through theslot 20. Obviously the oil, instead of passing through the port 17 ,imay be conveyed in any suitable directionl along a duct leading eitherinside or along thev outside of the head to the bits or cutting devices.

The finger piece 21 in the main .figures is shown swiveled upon' theva-lve 19 so that while the finger piece is held iu the slot 2O duringthe rotation of the member 16 into andf out of its socket 1&1' the valvemay remain stationary with respect to the valve seat or receptacle. Asindicated, however, in Fig. 3the finger piece 21"v may be formedintegral with the valve 19', andf instead' of a wire or other similarconnection 30 between the two bolts 2G and 29, a single bolt or rod 29may be employed. Obviously in this form of, the invention the valve mustremain stationary 'with the linger piece while the receptacle 16 rotatesrelatively. No objection, however, results since the parts between whichthere is relative movement are always well lubricated.

I claim: 4

1. The ycombination with a rotary cutter head formed with an oil portthrough the side thereof, of an 'oil receptacle carried by the headadjacent to said port, said receptacle having a valve seat at the endadjacent to the port, a valve cofo'perat-ing' with said valve seat, anda finger piece-'extending laterally from said valve for ula-ting thevalve and at an angle to'k the axis thereof.

2. A device as set forth in claim' 1in which the valve is self closingand the finger piece serves t0 open the same. y

3. The combination of a rotary 'cutter head formed with alateral oilport, acombiued `handle and oil receptacle connected to the head justoutside of said port, and means to cause the delivery of oil from thereceptacle through said port, said voil delivery means comprising avalve and a linger piece projecting at right ai'iglesv to the axis ofthe valve, there being provided a slot through the side of the cutterhead throughA which said finger pie'ce set forth. n l n f1.V The hereindescribed oil receptacle comprising a hollow body, a plug' for the de'-livery end of the body, a bolt projecting inward through said plug, avalve connected to the bolt and co-operating witlrpthe outer face' ofthe plug, a fingerpie'ce projecting laterally from the valve, av pair ofspaced plugs carried by the opposite end` of the body, ya boltprojecting through the inner one of these two valves, a heavy springcooperating betweenf the latter mentioned' bolt and its plug serving toproject the bolt out'. ward,- a tie member extending between' the twoplugs, a' valve co-operating' with the inner face of the outer plug ofthe pair of plugs, and a light spring located between the secondmentioned Vbolt and the latter mentioned valve, substantially as setlforth.

In testimony whereof I affixmy' signature.

CHARLESJ. PETREASEK.

projects substantially asv

